Abstract:
A pneumatic tire in which a sealant layer has been formed based on a decomposition reaction of polyisobutylene and which has an excellent puncture-preventing function while avoiding any inconvenience aroused by the sealant layer formation. The pneumatic tire has a sealant layer in that region of the inner surface of the tire which corresponds at least to the tread. The sealant layer is made of a pressure-sensitive adhesive sealant obtained by heating a rubber composition comprising 100 parts by weight of a rubber ingredient comprising at least 50 wt.% polyisobutadiene and 0.2 to 20 parts by weight of a peroxide. A liquid ethylene/alpha-olefin copolymer, liquid polybutadiene, or liquid polyisoprene is added as a pressure-sensitive adhesive for the sealant layer in an amount of 5 to 50 parts by weight.
Abstract:
A pneumatic tire, comprising adhesive sealant applied onto the inner surface thereof, wherein an air barrier membrane is disposed on the inner surface of the tire at least at a tread part, a space part is formed between the air barrier membrane and the inner surface of the tire, and the adhesive sealant is stacked on the space part side surface of the air barrier membrane, whereby an increase in weight can be minimized and a workability in handling the tire can be increased.
Abstract:
A sealant rubber composition which forms a spongy tacky sealant layer having moderate viscosity properties and a pneumatic tire having in the tire main body a tacky sealant layer obtained by heating the rubber composition. The rubber composition comprises: 95 to 50 parts by weight of a polymer decomposable with a peroxide 5 to 50 parts by weight of a polymer crosslinkable with a peroxide and a peroxide, the amount which is 0.2 to 20 parts by weight per 100 parts by weight of these polymers.
Abstract:
A tubeless tire (1) which has a sealant layer (4) being comprised of a sealant and closely attached on the inside surface of an inner liner layer (3) for retaining the inside of the tire in the air-tight state, characterized in that a cover layer (5) comprising an elastomer having high air permeability is closely attached to the sealant layer (4). The tubeless tire can exhibit satisfactory auto-sealing capability with a reduced amount of a sealant applied.